TKX 5-Speed Conversion Package | 1970-1972 Pontiac Firebird | Console Shifter

TKX 5-Speed Conversion Package | 1970-1972 Pontiac Firebird | Console Shifter

TKX 5-Speed Conversion Package | 1970-1972 Pontiac Firebird | Console Shifter

Description

Key Features

  • 600 lb-ft torque capacity with 8,000 RPM engine speed capability and 7,500 RPM shift points
  • 26-spline input shaft with 31-spline output shaft for maximum drivetrain strength
  • Complete auto-to-manual conversion for 1970-1972 Pontiac Firebird with factory console compatibility
  • End-loading case design fits GM A-bodies without tunnel modifications
  • Multi-cone synchronizers with sintered bronze and carbon hybrid rings for smooth high-RPM shifts
  • All gears and shafts machined from special-grade ASTM 4615 steel
  • Three-piece ribbed aluminum housing delivers outstanding structural stiffness
  • Multiple gear ratio configurations available: close-ratio 2.87:1 or wide-ratio 3.27:1 first gear
  • Retains OEM shift location for stock console appearance
  • 99 lbs dry weight - one of the lightest high-capacity 5-speeds available

Description

Ditch the slushbox and drop a modern 5-speed into your '70-'72 Firebird with MDL's complete TKX conversion package. This isn't a parts-bin kit - it's a fully engineered auto-to-manual solution designed specifically for second-gen F-bodies running BOP engines. The TREMEC TKX delivers 600 lb-ft of torque capacity while solving the biggest headache in classic muscle conversions: tunnel clearance. The TKX's revolutionary end-loading case design clears GM A-body tunnels without cutting or modification, giving you a clean install that looks like it rolled off the assembly line with three pedals.

The TKX represents TREMEC's ground-up aftermarket design, not a repurposed OE transmission. Multi-cone synchronizers with hybrid sintered bronze and carbon rings deliver smooth, precise shifts at engine speeds up to 7,500 RPM - perfect for high-winding Pontiac V8s. The robust internal architecture features a three-rail shift system with steel shift forks, tapered roller bearings on the input, output, and countershafts, and caged needle bearings on the main shaft for reduced NVH and extended service life. Gaskets at all flanges eliminate leaks and simplify installation.

This package includes a custom console shifter that preserves your Firebird's factory interior appearance while delivering modern shift quality. The included high-performance billet aluminum short-throw shifter isolates road noise and provides clean, crisp shifts. Choose from multiple gear ratio configurations - close-ratio (2.87, 1.89, 1.28, 1.00, 0.68 or 0.81 fifth) for maximum acceleration, or wide-ratio (3.27, 1.98, 1.34, 1.00, 0.72 fifth) for street-friendly spacing. The 2.7-quart fluid capacity accepts TREMEC HP-MTF, Dexron-III, or GM Synchromesh.

MDL's guided package builder walks you through every component selection - transmission, bellhousing, clutch system, hydraulics, flywheel, crossmember, and driveline components - ensuring perfect compatibility between all parts. Our concierge service provides expert consultation to match the right configuration to your engine combination, driving style, and budget. Built for enthusiasts who demand the best drivetrain technology behind their classic Pontiac power.

Kit Includes

  • TREMEC TKX 5-speed transmission with high-performance billet aluminum short-throw shifter (choice of gear ratios)
  • Custom console assembly with mounting hardware
  • BOP-pattern bellhousing (aluminum or steel options)
  • Bellhousing-to-transmission hardware kit
  • Steel billet SFI-approved flywheel with proper Pontiac balance
  • ARP flywheel bolt kit
  • Complete clutch kit matched to your torque requirements (multiple options available)
  • Pressure plate bolt kit
  • Hydraulic clutch master cylinder kit with reservoir
  • Hydraulic clutch line
  • Pedal pad kit
  • Shift knob with thread adapters
  • Shift lever (multiple length options)
  • Shift boot
  • Speedometer cable adapter and driven gear
  • Speedo gear retaining clip
  • Reverse light wiring harness
  • Crossmember and transmission mount
  • 31-spline slip yoke (choice of U-joint series)
  • Premium transmission fluid (3 quarts)
  • Complete installation documentation
  • Lifetime technical support from MDL drivetrain specialists
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